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Topic: Arduino error can't upload the program (Read 643 times) previous topic - next topic


why when I upload the program there is a warning

avrdude: ser_open (): can't open device "\\. \ COM6": The semaphore timeout period has expired.


Jan 07, 2020, 12:48 pm Last Edit: Jan 07, 2020, 12:48 pm by ballscrewbob
Could you take a few moments to Learn How To Use The Forum.
It will help you get the best out of the forum in the future.

Posting tips.
  • Always list the version of the IDE you are using and the board version if applicable.
  • How to insert an image into your post. ( Thanks Robin2 )
  • Add your sketch where applicable but please use CODE TAGS ( </> )
  • Add a SCHEMATIC were needed even if it is hand drawn
  • Add working links to any specific hardware as needed (NOT links to similar items)
  • Guessing is not the best way to describe an issue. Actual facts are the most important.
It may not be the answer you were looking for but its the one I am giving based on either experience, educated guess, google (who would have thunk it ! ) or the fact that you gave nothing to go with in the first place so I used my wonky crystal ball.

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